Abstract: A camera module is provided. The camera module includes a housing assembly, a lens assembly that is accommodated in the housing assembly and that includes at least one lens, and an aperture module that adjusts an amount of external light incident on the at least one lens. The aperture module includes an aperture base including a base opening through which the at least one lens is exposed based on being viewed from above the at least one lens, an aperture slider that is disposed on one side surface of the aperture base and that performs a sliding motion along a specified path, an aperture lever that rotates through a specified angle depending on the sliding motion of the aperture slider, and aperture blades that move toward or away from each other depending on a rotation of the aperture lever.

Abstract: Various embodiments include camera movement control for reduced power consumption. Some embodiments, for example, may include operating a camera module in a power saving mode, in which focus movement control may be synchronized with frame capture. According to some examples, such synchronization may include holding a position (e.g., a focus position) of a lens group and/or an image sensor of the camera module during some integration time periods. Furthermore, such synchronization may include enabling power saving movement (e.g., between a focus position and a neutral position) of the lens group and/or the image sensor during some other time periods, such as during intervals (e.g., blanking intervals) between integration time periods, and/or during integration time periods for image frames that are expendable.

Abstract: A camera module includes: a lens module disposed in a housing and a stop module coupled to the lens module. The stop module includes apertures having different diameters from each other so as to selectively change an amount of light incident on the lens module, a magnet portion to select any one of the apertures by movement of the magnet portion, and a coil disposed on the housing facing the magnet portion to move the magnet portion.

Abstract: A camera module includes a housing including a lens module; a diaphragm module to form N apertures of different sizes, where N is a natural number, with blades disposed on an object side of the lens module; and a diaphragm driving unit disposed with the diaphragm module, and including a driving coil and a magnetic member disposed opposite to the driving coil, the magnetic member being movable in a direction perpendicular to an optical axis to be fixed in N positions along a movement path.

Abstract: The lens barrel includes an imaging optical system comprising at least a first lens, a plate-shaped protection glass which is disposed closer to a subject side than the first lens and has light transmission, and an annular ring part provided on the outer circumferential edge of the surface of the protection glass facing the subject side.

Abstract: An electronic candle with electromagnetic drive unit includes a casing, a wick assembly, a light source module, an electromagnetic drive unit, and a driving circuit. The casing has a top provided with an opening having a support, and the support is provided with an aperture. The wick assembly includes a wick element having a wick plate and a counterweight element which has a counterweight block. The counterweight block is combined with a magnet. The wick assembly swings freely by being supported by the support. The light source module projects light to the wick plate. The electromagnetic drive unit drives the magnet. The driving circuit electrically controls the light source module and the electromagnetic driving unit.

Abstract: There are provided using deuterium oxide as a media for transmitting high power lasers to perform laser operations, such as cutting, boring and drilling, a target material. High power laser beams are transmitted through a deuterium oxide beam path to a target material, including material in a pressure containment vessel.

Abstract: An image-capturing device having infrared filtering switchover functions includes an infrared light emitting diode, an image sensor, an ambient light sensor, an infrared filter member and a switch module. The infrared light emitting diode emits infrared lights outwardly. The image sensor receives a reflection light reflected from an object. The ambient light sensor receives an ambient light. The infrared filter member filters infrared rays from the reflection light at a first location or the ambient light at a second location. The switch module is coupled to the infrared filter member, and can alternatively move the infrared filter member to the first location and the second location. The infrared lights are part of the reflection light and the ambient light.

Abstract: A magnetic driver includes a rotor magnet, a coil bobbin around which a coil is wound, and which has a through hole in a central portion, a yoke including a straight portion to be inserted into the through hole, and an arcuate portion connected to a distal end of the straight portion, a support member which rotatably supports the rotor magnet, and a thrust receiving member which includes an engaging portion to be engaged with the support member, has one surface which regulates one end of the rotor magnet in a thrust direction, and the other surface on which the coil bobbin is placed, and is held between the coil bobbin and the arcuate portion of the yoke. The yoke is assembled as an integrated yoke by inserting the straight portion into the through hole, and fixing the straight portion to the arcuate portion as another member.

Abstract: A lens device (2) is provided with a first operating ring (11) for adjusting the opening surface area of an aperture device (15) and a second operating ring (12) for adjusting the transmittance of a variable light transmittance filter (16). The correspondence relation between the operational amount for the first operating ring and the rate of change in the amount of light transmitted by the aperture device and correspondence relation between the operational amount for the second operating ring and the rate of change in the amount of light transmitted by the variable light transmittance filter are the same.

Abstract: The apparatus includes an upper substrate and a lower substrate, each of which has an optical aperture, at least one light control unit, a spacer arranged between the upper substrate and the lower substrate to provide a space in which the light control unit can move, and a drive unit arranged on the upper substrate to drive the light control unit. The drive unit includes a magnet arranged at a center of rotation of the light control unit and an electromagnetic drive source including a coil core and a winding coil, the coil core being arranged in such a way as to be opposed to the magnet. A positioning member is provided on the upper substrate. The distance between the coil core and the magnet is kept constant by the positioning member.

Abstract: In an imaging apparatus including a stepping motor that drives a diaphragm, a favorable moving image exposure control is carried out while reducing electrical power required for holding the diaphragm position. When a rotor and the magnetic poles of a stator do not face each other in a first mode, a control unit of the stepping motor drives the rotor to a facing position, and shuts off the current in a coil. When the diaphragm driving does not occur in a second operation mode, the control unit shuts off the current in the coil at the state where the rotor of the motor and the magnetic poles of the stator face each other. A holding current to be supplied to the motor is shut off in the first and second. The program profile of a diaphragm drive method and an exposure control is switched depending on the type of an imaging lens unit.

Abstract: A light amount adjustment device capable of adjusting the amount of light at high speed and with accuracy. When a rotary plate is rotatively driven by a motor, diaphragm blades disposed between the rotary plate and a cam plate are rotatively driven by the rotary plate in a plane perpendicular to an optical axis. When a coil disposed on the cam plate through a back yoke is energized and a magnetic field is generated around the coil, a magnetic attracting force is applied to the rotary plate rotating under the magnetic field, whereby the rotary plate is displaced toward the back yoke and frictions between the diaphragm blades and the rotary plate, etc. increase, so that rotations of the diaphragm blades are decelerated.

Abstract: There is provided a camera module including: a first diaphragm opened and closed according to a first electrical signal and including a first light quantity adjustment hole having a first size when being closed; a second diaphragm opened and closed according to a second electrical signal and including a second light quantity adjustment hole having a second size different from the first size when being closed; and a control unit electrically connected to the first and second diaphragms and controlling the first and second electrical signals transmitted to the first and second diaphragms, respectively.

Abstract: A drive mechanism includes: an actuator including a rotor magnetized; a magnetic body, a magnetically attractive force being generated between the magnetic body and the rotor; and a sandwiched member sandwiched between the rotor and the magnetic body. At least one of the magnetic body and the sandwiched member is coupled to the rotor, and the magnetic body and the sandwiched member slidably contact each other.

Abstract: An aperture device includes: a board including an opening; a step motor capable of stopping every predetermined rotational angle; an output member including first and second pins and rotating a predetermined range by the step motor; and first and second blades driven by the output member with first and second blades respectively engaging with the first and second pins, linearly moving in opposite directions, and covering the opening to adjust an aperture area of the opening; wherein an X-axis indicates a phantom line passing through a rotational center of the output member and extending in the moving directions of the blades, and when the aperture area is a minimum, an angle between a directional line, which connects the rotational center with the first pin, and the X-axis is from minus 20 degrees to plus 30 degrees.

Abstract: A light amount adjusting apparatus includes: a two-dimensional (2D) aperture assembly that adjusts an opening area of a via hole through which light is transmitted; a three-dimensional (3D) aperture plate that forms a first opening and a second opening by blocking a part of the via hole, or moving to outside of the via hole to open the via hole; a first shielding plate that is movable to open or close the first opening; and a second shielding plate that is movable so as to close the second opening when the first shielding plate opens the first opening and to open the second opening when the first shielding plate closes the first opening.

Abstract: In an imaging apparatus including a stepping motor that drives a diaphragm, a favorable moving image exposure control is carried out while reducing electrical power required for holding the diaphragm position. For moving image exposure control, a determination unit determines the presence or absence of the diaphragm driving. When a rotor and the magnetic poles of the stator do not face to each other in the first operation mode, the control unit of a stepping motor drives the rotor to a facing position, and shuts off the current in a coil. When the diaphragm driving does not occur in the second operation mode, the control unit of a stepping motor shuts off the current in the coil at the state where the rotor of the motor and the magnetic poles of the stator face to each other. A holding current to be supplied to the motor is shut off in the first and second operation modes, whereby the lower power consumption can be realized.

Abstract: An actuator including a magnetic field generator configured to provide a magnetic field; and a conductive element mounted for movement relative to the magnetic field generator wherein the conductive element forms a series of loops around a series of different axes.

Abstract: A light amount adjustment device capable of adjusting the amount of light at high speed and with accuracy. When a rotary plate is rotatively driven by a motor, diaphragm blades disposed between the rotary plate and a cam plate are rotatively driven by the rotary plate in a plane perpendicular to an optical axis. When a coil disposed on the cam plate through aback yoke is energized and a magnetic field is generated around the coil, a magnetic attracting force is applied to the rotary plate rotating under the magnetic field, whereby the rotary plate is displaced toward the back yoke and frictions between the diaphragm blades and the rotary plate, etc. increase, so that rotations of the diaphragm blades are decelerated.

Abstract: A lens barrel that is capable of reducing a size and cost by omitting an actuator only for diaphragm blades, and of preventing a change of a diaphragm aperture due to a variation in a part accuracy of a mechanism that drives diaphragm blades. Diaphragm blades have cam engagement parts, respectively. A holding member holds the diaphragm blades so as to be rotatable in directions to open and close an aperture. An energizing member energizes the diaphragm blades in a direction to open or close the aperture. A moving member has cam surfaces that engage with the cam engagement parts, and moves in an optical axis direction to operate the diaphragm blades by cam actions between the cam engagement parts and the cam surfaces against energizing force of the energizing member. Regulation parts regulate the operations of the diaphragm blades by the energizing force of the energizing member.

Abstract: An optical path adjusting device includes a supporting plate having a hole through which light travels, a two-dimensional (2D) aperture disposed in the supporting plate so as to adjust an open area of the hole, and a three-dimensional (3D) aperture having a plurality of first blinds and a plurality of second blinds. The plurality of first blinds are disposed to correspond to a first area of the hole so as to move to open or close the first area, and the plurality of second blinds are disposed to correspond to a second area of the hole so as to move to open or close the second area.

Abstract: A light amount adjusting device including a support plate comprising a first through hole through which light passes; a first slider that comprises a second through hole corresponding to the first through hole, and linearly moves with respect to the support plate along a first direction; a first driver for generating a driving force for moving the first slider with respect to the supporting plate; and a light amount adjuster installed on the first slider and for adjusting an amount of light passing through the light amount adjuster. By using such a simple and compact light amount adjusting device, a two-dimensional (2D) photographing or a three-dimensional photographing is conveniently selected and performed.

Abstract: A diaphragm control apparatus is provided in a camera body, in which a controller drives a stepping motor to move the slider away from an origin position, thereafter drives the stepping motor in the opposite direction toward the origin position, and thereafter detects the slider position after holding the stepping motor for a first waiting time upon a distance from the slider to the origin position becoming less than slider-moving distance for one step of the stepping motor. The controller causes the stepping motor to enter a free state upon a lapse of the first waiting time and detects the slider position upon a lapse of a second waiting time to set an initial excitation pattern from a difference between the slider position detected during the first waiting time and the slider position detected in the free state thereof and from the moving distance of the slider.

Abstract: A diaphragm control apparatus in a camera body includes a stepping motor, a lead screw thereof, wherein a slider is driven by the lead screw, a position detector, and a controller. When the stepping motor is in a free state, the slider allows a diaphragm operatively-associated rod to move to an initial position. The controller detects the slider origin position when the stepping motor is in the free state and drives the stepping motor stepwise to move the slider away from the origin position against a biasing force of a resilient biaser, and drives the stepping motor stepwise to move the slider toward the origin position while detecting the slider position; and sets an initial excitation pattern of the stepping motor upon a distance from the detected slider position to the origin position becoming less than a slider moving distance for one step of the stepping motor.

Abstract: A diaphragm control apparatus in a camera body includes a stepping motor; a lead screw thereof, wherein a slider is driven by the lead screw; a position detector; and a controller. When driving the stepping motor by a predetermined number of steps in a direction to move the slider away from an origin position, the controller detects the slider position before driving the stepping motor stepwise as the origin position via the position detector, and thereafter detects a stepping position of the slider to compare the stepping position with the origin position each time the stepping motor is driven by one step, and counts the number of steps based from the moment at which the stepping position of the slider exceeds a predetermined position in the direction to move the slider away from the origin position against the biasing force of the resilient biaser.

Abstract: A drive mechanism includes: an actuator including a rotor magnetized; a magnetic body, a magnetically attractive force being generated between the magnetic body and the rotor; and a sandwiched member sandwiched between the rotor and the magnetic body. At least one of the magnetic body and the sandwiched member is coupled to the rotor, and the magnetic body and the sandwiched member slidably contact each other.

Abstract: A diaphragm blade includes a light-shielding, thin-plate blade base made of laser absorptive resin to regulate an aperture, and a first shaft portion made of laser transmissive resin and provided on one surface of the blade base. The first shaft portion includes a cylindrical member which is welded to the protruding weld portion, a protruding weld portion integrally formed with the blade base, and a recess formed at the back side of the protruding weld portion. The cylindrical member has a first recess defined at one end thereof near the blade base and coming into contact with the protruding weld portion, and a second recess defined at the other end. A contact surface of the protruding weld portion is melted with laser beam transmitted through the cylindrical member, whereby the protruding weld portion is welded to the cylindrical member.

Abstract: A vane driving device includes: a board having an opening; a blade changing an area of the opening, having a cam slot, and being elastically deformable; and a drive member transmitting a drive force from a drive source to the blade, and having a drive pin engaging the cam slot. The drive member is stopped by contacting the drive pin with at least one of end portions of the cam slot, when the blade is located in a fully opened state or in a small aperture state.

Abstract: In an imaging apparatus including a stepping motor that drives a diaphragm, a favorable moving image exposure control is carried out while reducing electrical power required for holding the diaphragm position. For moving image exposure control, a determination unit determines the presence or absence of the diaphragm driving. When a rotor and the magnetic poles of the stator do not face to each other in the first operation mode, the control unit of a stepping motor drives the rotor to a facing position, and shuts off the current in a coil. When the diaphragm driving does not occur in the second operation mode, the control unit of a stepping motor shuts off the current in the coil at the state where the rotor of the motor and the magnetic poles of the stator face to each other. A holding current to be supplied to the motor is shut off in the first and second operation modes, whereby the lower power consumption can be realized.

Abstract: An image photographing device including a lens holder including a lens group and a coil unit that generates an electromagnetic force, a housing into which the lens holder is movably inserted, including a magnet that faces the coil unit, an image sensor, and a diaphragm formed of nonmetal and attached to the housing and elastically supporting the lens holder. Accordingly, the diaphragm has a predetermined elasticity although not reducing the thickness, the lens holder can properly follow the signal of the coil unit, the image photographing device is highly producible, and the possibility that the diaphragm is plastically deformed is small. Also, the terminal of the coil unit is connected to a separate terminal unit installed outside the diaphragm, such that the material used to form the diaphragm can be selected regardless of the conductivity, and foreign materials, such as, flux, can be prevented from contaminating the inside of the device and degrading the quality of an image.

Abstract: A small-size light controlling apparatus in which, it is not necessary to draw a wire for a diaphragm control, from a diaphragm mechanism, and an optical apparatus in which the light controlling apparatus is used, are provided. The light controlling apparatus includes a substrate having an optical aperture which is fixed, a diaphragm blade which is displaceable, a first magnet which is fixed to the diaphragm blade, and a coil which is disposed around the substrate. An external magnetic field which acts on the first magnet is changed according to an electric power supply to the coil, and the diaphragm blade is displaced by displacing the first magnet according to the change in the external magnetic field.

Abstract: A diaphragm control apparatus in a camera body includes a stepping motor; a lead screw thereof, wherein a slider is driven by the lead screw; a position detector; and a controller. When driving the stepping motor by a predetermined number of steps in a direction to move the slider away from an origin position, the controller detects the slider position before driving the stepping motor stepwise as the origin position via the position detector, and thereafter detects a stepping position of the slider to compare the stepping position with the origin position each time the stepping motor is driven by one step, and counts the number of steps based from the moment at which the stepping position of the slider exceeds a predetermined position in the direction to move the slider away from the origin position against the biasing force of the resilient biaser.

Abstract: A vane driving device includes: two boards each having an opening and defining a blade chamber therebetween; a blade changing an area of the opening and housed in the blade chamber; a drive source for driving the blade, the drive source including: a coil winded around a stator and exciting a stator; a rotor rotatably supported by a rotary shaft, rotatable in conjunction with the rotary shaft, and magnetized to have different polarities in a circumferential direction; and a rotor pinion meshing a driven member, and integrally formed in the rotary shaft; and a printed substrate electrically connected to the coil. The two boards define a drive source chamber housing the drive source therebetween. At least one of the two boards has an opening for escaping the coil outwardly from the drive source chamber. The printed substrate is arranged on a outer wall surface opposite to the drive source chamber.

Abstract: An optical element scanning device (10) includes a base plate (200) and one or more linear actuators (210, 220) operably connected to the base plate. An armature (110) may be pivotably connected to the one or more linear actuators, and an optical element (100) may be operably connected to the armature.

Abstract: A mechanical shutter includes a base, four shutter blades, four permanent magnets, and four electromagnets. The base has an aperture for permitting light into a camera module. The shutter blade includes a light shielding portion capable of moving across the aperture by rotating about a shaft formed on the base, a securing portion secured on the base, and an elastic portion connecting the light shielding portion and the securing portion. The permanent magnet is secured on a light shielding portion and sleeves around a shaft. The electromagnets are capable of providing magnetic force to rotate the permanent magnets.

Abstract: An image projecting apparatus has an integrator for generating plural secondary-light-source images for generating illumination light with a uniform intensity; and a variable stop mechanism arranged at or near a position conjugate with the secondary-light-source images. The variable stop mechanism has a base plate having a fixed aperture; and a stop blade which moves across the aperture for changing a quantity of light. The change in the quantity of light passing through said variable stop caused by the movement of said stop blade is greater than a change in a size of an effective region of a stop aperture.

Abstract: A light quantity adjuster includes: a blade member forming an aperture; a stepping motor that moves the blade member to open/close the aperture; and a control section that controls driving of the stepping motor, and increases a rotational speed of the stepping motor after a resistance acting on the stepping motor changes from static friction to dynamical friction in case of closing the aperture.

Abstract: A diaphragm unit includes: a plate-like base member having an optical path hole formed therein; diaphragm blades overlapping with each other in an optical axis direction of an optical system, being supported by the base member so as to be movable in directions in which the diaphragm blades approach and depart from the optical axis along a plan perpendicular to the optical axis, and forming a diaphragm opening centered on the optical axis inside the optical path hole; and a driving mechanism adjusting the size of the diaphragm opening by moving the diaphragm blades.

Abstract: An electromagnetic actuator includes; a coil for excitation; a stator excited with different magnetic poles by energization of the coil; a rotor magnetized with different magnetic poles in a circumferential direction thereof, and rotated by a magnetic force generated between the rotor and the stator; and an outputting member rotated in conjunction with the rotor and outputting rotational movement of the rotor to a first blade and a second blade. The rotor and the outputting member are jointed by welding and a welding portion of the rotor lies in a boundary of the magnetic poles thereof.

Abstract: An electromagnetic transmission device. A guide bar connects to a fixed base and includes magnetic-permeable material and a first central height plane. A coil connects to the fixed base. A support base movably fits on the guide bar. An annular magnetic member connects to the support base and is surrounded by the coil. A magnetization direction of the annular magnetic member is perpendicular to a moving direction of the support base and annular magnetic member. The annular magnetic member includes a second central height plane. The coil interacts with the annular magnetic member to generate a first force. When moving to separate the second central height plane from the first central height plane, the annular magnetic member interacts with the guide bar to generate a second force, driving the support base and annular magnetic member to move along a direction perpendicular to the magnetization direction of the annular magnetic member.

Abstract: An actuator drive circuit includes a counter starting counting of a frequency-divided clock obtained by dividing a frequency of a reference clock in response to an activation signal, a D/A converter providing a converted voltage increasing gradually and stepwise in response to an output of the counter, a coil current control amplifier comparing a coil current detection voltage corresponding to a value of a coil current of the actuator with the converted voltage immediately after activation, comparing the coil current detection voltage with a coil current limitation reference voltage corresponding to an upper limit value of the coil current after the converted voltage matches the coil current limitation reference voltage, and providing an amplified output voltage prepared by amplifying a difference between the compared voltages, and a drive current output circuit providing a drive current of the actuator according to the amplified output voltage of the coil current control amplifier.

Abstract: An electromagnetic actuator includes a rotor rotatable within a predetermined angular range, a magnetizing coil, and a yoke having an arcuate surface facing the rotor, and first and second magnetic-pole parts that have mutually different magnetic poles upon energizing the coil. The rotor includes a magnetized rotor part defining the outer peripheral surface of the rotor and magnetized to have different magnetic poles, a non-magnetized driving pin rotatable with the magnetized rotor part, and a protrusion part protruding radially from the rotor and facing the first or second magnetic-pole part while being magnetized to have the same magnetic pole as the outer peripheral surface of the rotor. The surface of the rotor that faces the yoke and that exerts a magnetic action is increased due to the inclusion of the protrusion part, and hence a desired maintaining force and driving torque can be obtained.

Abstract: An ion conducting high-polymer member is formed by an ion containing polymer, and has a circular arc shape. An chord length of the ion conducting high-polymer member is changed. Due to the change in the chord length of the ion conducting high-polymer member, there is change in a relative position of a driving shaft which is coupled with the ion conducting high-polymer member, with respect to a rotating shaft. Due to the change in the relative position of the driving shaft, a circular ring shaped peripheral section is displaced, and due to a rotation of a diaphragm member around the rotating shaft as a center, a part of an aperture is shielded by the circular ring shaped peripheral section, and a diameter of the aperture is changed.

Abstract: For providing a small-size light controlling apparatus in which a desirable opening and closing operation of a diaphragm blade is possible by driving an ion-conducting actuator by a small voltage, a light controlling apparatus is made to include a substrate in which an optical aperture is formed, a light controlling mechanism which is provided with another optical aperture and a shielding section, an actuator which generates a power which rotates the light controlling mechanism, a controlling mechanism which displaces the actuator, and a transmission member of which, one end is coupled with the light controlling mechanism, and the other end is coupled with the actuator via a coupling member, and which transmits the power of the actuator to the light controlling mechanism. The transmission member, at the time of transmitting the power, widens the displacement of the actuator.

Abstract: A diaphragm driving device for a camera including a camera body and an interchangeable lens which is detachably attached to the camera body, wherein the interchangeable lens includes a diaphragm mechanism having an in-lens spring device for performing a stop-down operation, the in-lens-spring device having a spring constant. The camera body includes a diaphragm drive mechanism having a diaphragm drive motor and an in-body spring device, both of which are for making the diaphragm mechanism of the interchangeable lens perform the stop-down operation, and a controller for controlling a driving current which is supplied to the diaphragm drive motor in accordance with the spring constant of the in-lens spring device.

Abstract: A magnetic actuator according to the present invention includes a stator yoke made of a magnetic substance and having projecting streaks on the inner circumference thereof to produce magnetic bias to a rotor magnet. The stator yoke is fitted into and fixed to a coil bobbin, a base plate, or a sheet metal having a concave portion formed therein. This can hold shading members to a totally closed position after shutoff of electric current through a coil and can stably achieve an appropriate position of the stator yoke in a rotation direction to eliminate the need for fixing the stator yoke with an adhesive or the like.

Abstract: An optical apparatus is disclosed which has a light amount adjusting unit, a lens to be driven by a linear actuator, and a detector for detecting the position of the lens, and which can be reduced in size. The optical apparatus includes a light amount adjusting unit which adjusts a light amount by light shield members translating in a first direction, a vibration type linear actuator which drives the lens in an optical axis direction, a guide member which guides the lens in the optical axis direction, and a detector which detects the position of the lens. When viewed from the optical axis direction of the optical apparatus, the vibration type linear actuator, the guide member, and the detector are arranged along an outer surface of the light amount adjusting unit, the outer surface being provided in a second direction orthogonal to the first direction.

Abstract: A small-size light controlling apparatus in which, it is not necessary to draw a wire for a diaphragm control, from a diaphragm mechanism, and an optical apparatus in which the light controlling apparatus is used, are provided. The light controlling apparatus includes a substrate having an optical aperture which is fixed, a diaphragm blade which is displaceable, a first magnet which is fixed to the diaphragm blade, and a coil which is disposed around the substrate. An external magnetic field which acts on the first magnet is changed according to an electric power supply to the coil, and the diaphragm blade is displaced by displacing the first magnet according to the change in the external magnetic field.

Abstract: A magnetic actuator. A yoke comprises a first opening and a second opening, a frame, and a path. A first magnet is disposed in the first opening in the vicinity of the frame. A second magnet is disposed in the second opening in the vicinity of the frame. A coil comprises a wire surrounding the path. A light shield is connected to an end of the coil. When current passes through the coil, the coil moves along the path by magnetic induction between the first magnet and the second magnet such that the iris diaphragm is adjustable by the light shield.